var btn3=document.getElementById("btn3");
var btn4=document.getElementById("btn4");
var imgBox3=document.getElementById("imgBox3");
var imgBox4=document.getElementById("imgBox4");
function xiaoshi(){
	btn3.style.background="#f8f6f4";
	btn4.style.background="#f8f6f4";
	btn3.style.color="#666";
	btn4.style.color="#666";
	imgBox3.style.display="none";
	imgBox4.style.display="none";
}
btn3.onclick=function(){
	xiaoshi();
	btn3.style.background="white";
	btn3.style.color="red";
	imgBox3.style.display="flex";
}
btn4.onclick=function(){
	xiaoshi();
	btn4.style.background="white";
	btn4.style.color="red";
	imgBox4.style.display="flex";
}
